Your Bag

Why not add

Your bag is currently empty
Click to continue shopping

Item added to bag

Added to your bag

What would you like to do next?

Go to checkout

Error

You already have an item with this ingredient in your basket, please remove it and try again.

Error

You already have an item with this ingredient in your basket, please remove it and try again.

Ovex Suspension consultation

Please fill in the questionnaire below. Any information provided will be kept confidential and will only be seen by a prescriber. These questions are designed to give our prescriber enough information to make a decision on whether the treatment is suitable, please fill them in truthfully.

ovex suspension 100mg/5ml 30ml
P
Consultation required
  • Treats threadworms
  • Single dose
  • Liquid for children
  • Next day delivery available
  • Genuine medication
  • Discreet packaging
Threadworm Treatment

Ovex Suspension 100mg/5ml

Select a strength
Select a pack size:
Order within
for delivery on
TAKEN
Single dose
Repeat only if advised
TREATS
Threadworms
Check suitability for each person
SUITABLE FOR
Adults & children 2+
Liquid form
FORM
Suspension
From
£10.99
Dispatched
Same day
if ordered before 3pm

Key facts

HOW IT WORKS
Stops worms absorbing sugars so they die
PHARMACY
Pharmacy medicine, sold after consultation

WARNING Check household eligibility; repeat after 2 weeks only if advised

Discreet packaging
Rated Excellent
Same day dispatch - before 3pm
UK pharmacy

What is Ovex suspension?

Ovex suspension contains the active ingredient 'Mebendazole'. Mebendazole is an anthelmintic or anti-worm medication and are a safe and effective way to treat threadworms sometimes known as pinworms.

How to buy Ovex suspension online

You can use our online pharmacy service to buy Ovex suspension online in the UK with collection, free or next day delivery available. We are a regulated GPhC registered pharmacy based in the UK. As Ovex suspension is a 'Pharmacy-only' (P) medicine a pharmacist needs to have a consultation to make sure treatment is appropriate before you can purchase Ovex suspension.
Upon completion of your order, our pharmacist will then review your online assessment. If your assessment is approved, our pharmacy team will then dispense your order, which will be dispatched the same day using your chosen delivery method.

How it works

Ovex contains mebendazole which stops the worms from using glucose. The worms then lose their energy and quickly die.
It is important to note mebendazole does not kill the worms eggs. If reinfection occurs, your pharmacist may recommend a second dose after two weeks. Hygiene measures remain important because the medicine does not kill the eggs.

What are threadworms

You can check for threadworms by checking the stools, they will look like little pieces of white thread. They can also be seen around the anus particularly at night.
Other symptoms can include:

  • Itching around the anus or vagina especially at night
  • Irritability and waking up during the night
  • Difficulty sleeping
  • Nausea (feeling sick)
  • Abdomen pain

Once a person is infected if they scratch at them the eggs get lodged under their fingernails and are then transferred onto other objects. The tiny eggs can then be picked up and swallowed causing infection. Due to them being transferred from person to person very easily it is recommended to treat everyone in the household even if they have no symptoms, as it may take a few weeks for symptoms to show.

Household members should be treated at the same time only if the medicine is suitable for each person. Children under two and anyone pregnant need individual advice; everyone should follow the hygiene measures.

How to take Ovex suspension

Adults and children aged two and over: shake the bottle thoroughly, then measure one 5ml dose (100mg) using the supplied measuring cup. Do not use a kitchen teaspoon.

If reinfection occurs, a pharmacist may recommend another dose after two weeks. If symptoms worsen or do not improve after a few days, speak to a doctor.

Threadworm prevention

To help prevent threadworms from recurring you can:

  • Wash hands and scrub under fingernails – particularly after using the bathroom and before eating
  • Bathe or shower every morning
  • Rinse all toothbrushes before use
  • Trim fingernails
  • Wash any pyjamas
  • Wash bed sheets
  • Disinfect kitchen and bathroom surfaces
  • Vacuum and dust with a damp cloth
  • Wear underwear at night and change it in the morning
  • Keep fingers and thumbs out of mouths
  • Do not share towels
  • Do not shake clothing or bedding
  • Do not bite nails

Who cannot use Ovex?

Ovex is for adults and children aged two and over. Do not give it to a child under two without medical supervision. Do not use it if you are pregnant or allergic to mebendazole or another ingredient.

Check with a pharmacist before treatment if you:

  1. Take metronidazole: using it with mebendazole should be avoided.
  2. Take cimetidine, which can affect mebendazole levels.
  3. Are breastfeeding or may be pregnant.

Ovex suspension and pregnancy

Do not use Ovex during pregnancy without medical advice. Hygiene measures are the first step, particularly in the first 12 weeks. Threadworms are not harmful to your baby, and hygiene measures used consistently for six weeks can clear the infection without medicine.

Ovex suspension and breastfeeding

They are safe to take while breastfeeding, a small amount may pass into your breast milk. This is unlikely to cause any harm, if you notice any unusual behaviour such as not feeding as well or more irritable than usual contact your doctor or health visitor.

Ovex side effects

Like all medicines, Ovex suspension can cause side effects, although not everyone gets them. Possible effects include:

  1. Stomach pain
  2. Bloating
  3. Wind
  4. Diarrhoea

Frequently asked questions

  • How long does Ovex take to work?

    Ovex begins working straight away after just one dose. It can take several days for it to kill all the worms.

  • How long does Ovex last once opened?

    Follow the expiry date and storage directions on your bottle. The current Ovex suspension leaflet does not give a separate shorter period after opening. Do not use it after the printed expiry date.

  • Can I take Ovex while pregnant?

    Ask a doctor before treatment if you are pregnant. Use hygiene measures first; do not simply take the same medicine as the rest of the household.

  • Can I take Ovex while breastfeeding?

    Ovex is safe to take while breastfeeding at recommended doses a tiny amount may pass through breast milk into your baby but it is unlikely to do any harm.

  • How many doses of Ovex will I need?

    One dose is usually enough. If reinfection occurs, your pharmacist may recommend a second dose after two weeks. Continue hygiene measures because mebendazole does not kill worm eggs.

  • Does Ovex suspension expire?

    Yes, like most medicines it has a shelf life and will become less effective if it is left unused. Always check the expiry date of any medicines you are taking before you take them, the expiry date refers to the end of the month. If you find your medication has expired, you can post them to us, bring them to us or take them to your nearest pharmacy for safe disposal.

  • How should I store Ovex suspension?

    They should be stored in a dry area below 25°C and kept out of direct sunlight. Storing the medicine incorrectly could result in the medicine becoming less effective.

  • Is it safe to buy Ovex suspension from your pharmacy?

    We are a General Pharmaceutical Council (GPhC) registered pharmacy and we source all our pharmaceutical products from reputable wholesalers, the same wholesalers that provide the medicines used to fill NHS prescriptions.
    If you buy them from an unregistered pharmacy you may be wasting your money at best or at worst harm yourself buying and taking fake medicine. Always check to make sure where you are buying them from are registered with the GPhC.

Reviews describe individual experiences of our pharmacy service and are not a guide to how a medicine will work for you. Reviews are collected and verified by Priorly and are published unedited. Suspected side effects should be reported through the MHRA Yellow Card scheme.

Related products

Published
23rd May 2022
Last reviewed
18th August 2026
Next review
18th August 2028

Reviewed by